/**
 * Copyright (C) 2009 - 2013 SC 4ViewSoft SRL
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.achartengine.chartdemo.demo.chart;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;

import org.achartengine.ChartFactory;
import org.achartengine.chart.PointStyle;
import org.achartengine.renderer.XYMultipleSeriesRenderer;

import java.util.ArrayList;
import java.util.List;

/**
 * Trigonometric functions demo chart.
 */
public class TrigonometricFunctionsChart extends AbstractDemoChart {
    /**
     * Returns the chart name.
     * @return the chart name
     */
    public String getName() {
        return "Trigonometric functions";
    }

    /**
     * Returns the chart description.
     * @return the chart description
     */
    public String getDesc() {
        return "The graphical representations of the sin and cos functions (line chart)";
    }

    /**
     * Executes the chart demo.
     * @param context the context
     * @return the built intent
     */
    public Intent execute(Context context) {
        String[] titles = new String[]{"sin", "cos"};
        List<double[]> x = new ArrayList<double[]>();
        List<double[]> values = new ArrayList<double[]>();
        int step = 4;
        int count = 360 / step + 1;
        x.add(new double[count]);
        x.add(new double[count]);
        double[] sinValues = new double[count];
        double[] cosValues = new double[count];
        values.add(sinValues);
        values.add(cosValues);
        for (int i = 0; i < count; i++) {
            int angle = i * step;
            x.get(0)[i] = angle;
            x.get(1)[i] = angle;
            double rAngle = Math.toRadians(angle);
            sinValues[i] = Math.sin(rAngle);
            cosValues[i] = Math.cos(rAngle);
        }
        int[] colors = new int[]{Color.BLUE, Color.CYAN};
        PointStyle[] styles = new PointStyle[]{PointStyle.POINT, PointStyle.POINT};
        XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
        setChartSettings(renderer, "Trigonometric functions", "X (in degrees)", "Y", 0, 360, -1, 1,
                Color.GRAY, Color.LTGRAY);
        renderer.setXLabels(20);
        renderer.setYLabels(10);
        return ChartFactory.getLineChartIntent(context, buildDataset(titles, x, values), renderer);
    }

}
